Means for keying gears to shafts



Jan- 27, 1931. G. c. CARHART 4 1,196,261

MEANS FOR KEYING GEARS TO SHAFTS Filed Oct. 25, 1923 I NV EN TOR.

ATTORNEYS Patented 27,

GEORGE c. Y W

; MEANS FOR KE Y gim -rs, J

Application fi ledvoctober 23,'lsaa se n 10,375

This invention has for its 'object a particu 'larly simple and, efficient construction by which a gear having a relatively large bore or a gear which is of comparatively small diameter relatively to the shaft on which it is mounted, is locked or keyed to the shaft 7 without cutting or weakening the gear bea gear mounted on t .cated external of the gear for locking or keytween the bore'and the teeth. v

The invention consists in the novel features and in the combinations and constructions hereinafter set forth and'claime'd.

In describing this invention, reference is had to the accompanying drawings in which 33, Fig. 2.

Figure 4 is a section at right anglesto the plane of Figure 1'. the section being taken through member 7 I This invention comprises generally a shaft, e shaft. and means 10- ing the gear to the shaft.

, relatively small diameter mountedon the shaft, the shaft being formed witha cylindri-J I cal portion '3' which 7 fits the cylindrical bore I 1 of'th'e gear 2. The bore of the gear 2 isgcom-f paratively large, so that it extends close .to the toothed surface of the gear and, hence,

the cutting of keyways in the gear would weaken the gear.

The means external of the gear for keying it to the shaft, as here shown, comprises a a splined portion 4 at one side of the cylindrical portion 3. of. theshafton which the gear is mounted'and an annular flange 5 on one'side of the gear, the flange lapping or encircling the splined portionx and being formed with shaft;

' The splined portion 4 is of slightly greater CABHART, or SYRACUSE, NEW YoR'k,

V assmaoa Tonnown-iiirn dneit db li Panzer SYRACUSE, NEW YORK, econronerronorivi w roan i diameter'thanthe cylihdrlcal portion The -5;

shaft 1 and the torque is transmitted through an annular flange 5 and the splines 8. I

The shaft 1 as here shown, is mounted in a support 9 having spaced apart: bearings 10,11 engaging the cylindrical portions 3 and 12 of the shaft 1 on opposite sides of tlie splined portion 4:; and'the gear 2, ashere shown, is held from endwise movement out of engagement with the jsplined portion by means of a sleeve 13 interposed between the 15 threading on theouter end ofthe shaft.

3 is the-stem 0f the driving 'gear. of. acon- 'gear 2 and the bearing 10 and a sleeve 14 interposed between the bear'inglO and a nut ,Asclearly seen in the drawing, the shaft ventional change speed transmission gearing in which the'bearing 11 forthe shaft or stem is supported in the front wall of the usual gear housing and projects in advance of the gear housing, and the support 9- is den tachably secured as by cap screws to the wall j of the gear housing, this support being tubu- *lar in general forml I The shaft '1, as here shown, is the driving shaft of a change speed transmission gearing and: is formed with aspur gear at its innerl v o end for. coacting with a gear of a change 1 designates the shaft and 2 the gear of 7 speed transmission 1 is lncorporated.-

gearing in which a shaft By my invention a gear of comparatively ity of the bore of the gear.

WhatIclaimis:

wall of a gear The combination with the casing, a bearing in said wall, ashaft journalled in the bearing and projectingthrough the wall, the shaft having itsiendremote small diameter can'be mounted upon a'ghaft 4 I V V V and keyed thereto without weakening the V gear .by cutting or interrupting the c'ontinuf from said Wall threaded, a support 1 detach: I ably mounted on said wall and projecting therefrom, a .bearing for-the'shaft located I in the support andispaced apart from the former bearing and havingjan axial shifting] movement in the support, a gear mounted on the shaftfwithin the support and between the bearings, the gear and the shaft having means for interlocking and keyingthe gear 7 tween the nut and the shiftable bearing .anclbetween the shiftable bearing'and the opposing end of the gear;

In testimony whereof, I have hereunto slgnecl myname, at Syracuse, in the county v this of Onondagmfland state of New York, 17th day of October, 1923. i i' t v GEO RGEfl cARHART 

